com.google.gwt.text.client.IntegerParser Maven / Gradle / Ivy
/*
* Copyright 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.text.client;
import com.google.gwt.i18n.client.NumberFormat;
import com.google.gwt.text.shared.Parser;
import java.text.ParseException;
/**
* A localized parser based on {@link NumberFormat#getDecimalFormat}.
*/
public class IntegerParser implements Parser {
private static IntegerParser INSTANCE;
/**
* Returns the instance of the no-op renderer.
*/
public static Parser instance() {
if (INSTANCE == null) {
INSTANCE = new IntegerParser();
}
return INSTANCE;
}
protected IntegerParser() {
}
public Integer parse(CharSequence object) throws ParseException {
if ("".equals(object.toString())) {
return null;
}
try {
return (int) Math.rint(NumberFormat.getDecimalFormat().parse(object.toString()));
} catch (NumberFormatException e) {
throw new ParseException(e.getMessage(), 0);
}
}
}